PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

1-7-21-2Heater,vehicular,compartment

Celtech Corporation Div Use CAGE 65552 for All Orders · NSN 2540-01-116-3575 · FSC 2540 · No Item Name Available
Verified by PartsTable
NSN 2540-01-116-3575 — this item is cataloged by the U.S. Government under National Stock Number 2540-01-116-3575. Primary manufacturer part number: 1-7-21-2.
Features
  • Heater,vehicular,compartment — FSC 2540
  • Heat Delivery Direction: HORIZONTAL
  • Heat Outlet Quantity: 1
  • Current Rating in Amps: 4.0
  • Heat Delivery Rate: 15000.0 BRITISH THERMAL UNIT
  • Fuel Feed Method: EXTERNAL PUMP
  • Current Type: DC
  • Heating Element Type: COMBUSTION CHAMBER
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Heater,vehicular,compartment, cataloged under National Stock Number 2540-01-116-3575, is classified within Federal Supply Class 2540 (No Item Name Available) of the Vehicular Equipment Components group. The primary manufacturer of record is Celtech Corporation Div Use CAGE 65552 for All Orders. Government technical data includes 10 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active. Unit of issue: EA.

Technical Specifications
ParameterValue
NSN2540-01-116-3575
Primary Part Number1-7-21-2
Item NameHeater,vehicular,compartment
FSC / FSG2540 / 25 — No Item Name Available
ManufacturerCeltech Corporation Div Use CAGE 65552 for All Orders
StatusACTIVE
Heat Delivery DirectionHORIZONTAL
Heat Outlet Quantity1
Current Rating in Amps4.0
Heat Delivery Rate15000.0 BRITISH THERMAL UNIT
Fuel Feed MethodEXTERNAL PUMP
Current TypeDC
Heating Element TypeCOMBUSTION CHAMBER
Ignition MethodGLOW PLUG
Heat Medium TypeAIR
Voltage in Volts12.0
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Unit of IssueEA
Verified Substitutes 12
5930-00-056-7626172-1-2 INTERCHANGEABLE
Switch,push
Korry Electronics Co
5315-00-166-6431172-12 INTERCHANGEABLE
Pin,straight,headed
Ontic Engineering & Manufacturing, Inc Dba Ontic Us
5342-00-298-9481 INTERCHANGEABLE
Mount,resilient,weapon System
5340-00-313-68771721-2 INTERCHANGEABLE
Lock,special
Adams Rite Aerospace, Inc
5950-01-024-1937905510-1 INTERCHANGEABLE
Transformer,power
Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp
5841-01-099-876317212 INTERCHANGEABLE
Circuit,hybrid Prea
Astronautics Corporation of America
5355-01-242-185717212 INTERCHANGEABLE
Knob
G.s. Blodgett, Llc Div Blodgett
5945-01-260-7227172-12 INTERCHANGEABLE
Relay,electromagnetic
Teledyne Defense Electronics, Llc Dba Teledyne Relays Div Https://www.teledyne.com/what-We-Do/
5310-01-400-2173SKB-714 ITEM X180 INTERCHANGEABLE
Washer,flat
Coffin Turbo Pump Inc
5360-01-414-967717212 INTERCHANGEABLE
Spring,helical,extension
Lockheed Martin Corp
Cross-Reference Index
Part NumberManufacturer
1-7-21-2 PRIMARY Celtech Corporation Div Use CAGE 65552 for All Orders (USA)
4SK230 PRIMARY Oshkosh Defense Llc (USA)
114313-A Oshkosh Corp (USA)
1-7-21 Celtech Corporation Div Use CAGE 65552 for All Orders (USA)
4SK230 Oshkosh Corp (USA)
Related Parts
5930-00-056-7626INTERCHANGEABLE
SWITCH,PUSH
172-1-2
5315-00-166-6431INTERCHANGEABLE
PIN,STRAIGHT,HEADED
172-12
5342-00-298-9481INTERCHANGEABLE
MOUNT,RESILIENT,WEAPON SYSTEM
5340-00-313-6877INTERCHANGEABLE
LOCK,SPECIAL
1721-2
5950-01-024-1937INTERCHANGEABLE
TRANSFORMER,POWER
905510-1
5841-01-099-8763INTERCHANGEABLE
CIRCUIT,HYBRID PREA
17212
5355-01-242-1857INTERCHANGEABLE
KNOB
17212
5945-01-260-7227INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
172-12
5310-01-400-2173INTERCHANGEABLE
WASHER,FLAT
SKB-714 ITEM X180
5360-01-414-9677INTERCHANGEABLE
SPRING,HELICAL,EXTENSION
17212
4730-01-538-1058INTERCHANGEABLE
CLAMP,HOSE
17212
5340-01-571-5197INTERCHANGEABLE
PLUG,PROTECTIVE,DUST AND MOISTUR

Frequently Asked Questions

What is NSN 2540-01-116-3575?

NSN 2540-01-116-3575 is a Heater,vehicular,compartment, manufactured by Celtech Corporation Div Use CAGE 65552 for All Orders, classified under FSC 2540 (No Item Name Available). Status: active.

What are the part numbers for NSN 2540-01-116-3575?

NSN 2540-01-116-3575 has 5 cross-referenced part numbers: 1-7-21-2 (Celtech Corporation Div Use CAGE 65552 for All Orders), 4SK230 (Oshkosh Defense Llc), 114313-A (Oshkosh Corp), 1-7-21 (Celtech Corporation Div Use CAGE 65552 for All Orders), 4SK230 (Oshkosh Corp).

What NSN replaces 2540-01-116-3575?

There are 12 known substitutes for 2540-01-116-3575: 5930-00-056-7626, 5315-00-166-6431, 5342-00-298-9481 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 1-7-21-2?

Key specifications for 1-7-21-2: Heat Delivery Direction: HORIZONTAL; Heat Outlet Quantity: 1; Current Rating in Amps: 4.0; Heat Delivery Rate: 15000.0 BRITISH THERMAL UNIT. 10 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com